This conflicts with what I've always been taught, and with every high google result for 'tanning skin cancer'. (I'm in Australia, where the sun is especially damaging; but I'd be surprised if tanning were very dangerous here but fine elsewhere, and in any case the search results were not all local.) What are you basing it on?
It gets complicated. Sunburn (occasional high dose of sun) is unequivocally bad, and highly correlated with skin cancer. Regular, moderate exposure (could be described as tanning) is correlated to lower risk of cancer than getting little sun.
An examination of the current state of the scientific research shows that (i) severe sunburns are linked to increased risk of melanoma but non-burning sun exposure is linked to reduced risk of melanoma
This conflicts with what I've always been taught, and with every high google result for 'tanning skin cancer'. (I'm in Australia, where the sun is especially damaging; but I'd be surprised if tanning were very dangerous here but fine elsewhere, and in any case the search results were not all local.) What are you basing it on?